Staybolt structure



J R. FLANNERY AND E. I. 00008.

STAYBOLT STRUCTURE. APPLICATION FILED Dec, 7, 1920.

' Mr A Patented Oct. 25, 1921.

umrEosrAjTEs PATENT :oFFicE.

JOHN ROGERS FLANNERY AND ETHAN I. DODDS, OF PITTSBURGH, PENNSYLVANIA, ASSIGNORS TO FLANNERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

STAYBOLT STRUCTURE.

Specification of Letters Patent.

Patented Oct. 25, 1921.

Application filed December 7, 1920. Serial No. 428,968.

T 0 all whom it may concern:

Be it known that we, JOHN ROGERS F LAN- NERY and ETHAN I. Dorms, citizens of the United States, and residents of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Staybolt Structures; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in staybolt structures,-one object of the invention being to provide a staybolt structure which shall be so mounted in and secured to the boiler sheet that its outer end shall be substantially flush with the outer face of the boiler sheet, and in which the rounded head of the bolt shall be movable on a bearing ring which is movably supported by the sleeve member of the structure near the inner end of said member.

With this and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claim.

The accompanying drawing is a sectional view of a staybolt structure showing an embodiment of our invention.

1 represents an outer boiler sheet having an opening therein, the inner portion 2 of the wall of which may be slightly tapering or cylindrical, and the outer portion 3 of said wall is made with a decided incline so that it will flare outwardly.

A bearing sleeve 1 which may have a general tapering or conical exterior, passes through the opening in the boiler sheet and extends inwardly beyond the plane of the inner face thereof. The outer end of the bearing sleeve lies flush with the outer face of the boiler sheet and is made with an annular enlargement 5 having a beveled or flaring face 6 to lie against the beveled or flaring wall portion 3 of the opening in the boiler sheet. The annular enlargement 5 is also made with a beveled face 7 which, with a part of the beveled or flaring wall portion 3, forms a groove which receives a suitable welding alloy 8 to weld the sleeve to the boiler sheet.

The sleeve 4 is provided at its inner end with an inwardly projecting annular flange 9 having a beveled and rounded face 10, whereby a seat is formed on which the beveled -and rounded lower portion of a bearing ring 11 is movably mounted,said bearing ring having an external diameter appreciably less than the internal diameter of the portion of the bearing sleeve in which said ring is located.

The opening formed by the annular flange 9 and the opening in the bearing ring are appreciably greater in diameter than is the body portion of a staybolt 12 which passes through said openings, and said staybolt is provided with a head 13. This head is made with a rounded portion 14 having movable bearing on a beveled and curved face 15 of the bearing ring 11. The outer end portion of the bolt head may be somewhat flattened so that a comparatively short bearing sleeve may be employed and still permit the use of a closure 16 threaded into said sleeve so that the outer face of its angular portion 17 will be flush with the outer face of the boiler sheet. It will be observed that the bolt head extends but very slightly outwardly past the plane of the inner face of the boiler sheet.

Having fully described our invention, what we claim as new and desire to secure by Letters-Patent, is

In a staybolt structure of the flush type, the combination with a boiler sheet having an opening, the outer portion of the wall of which is made flaring, of a bearing sleeve passing through said opening and having its outer end flush with the outer face of the boiler sheet, said sleeve having an annular enlargement provided with two beveled faces, one of which rests upon the flaring portion of the wall of said opening and the other of said beveled faces cooperating with said flaring wall to form a groove, a weld occupying said groove, an inwardly projecting annular flange at the inner end of said sleeve and having a beveled face, a staybolt provided with a head having a rounded portion,

a bearing ring movably mounted on the beveled annular flange of the sleeve and having a rounded portion on which the rounded portion of the bolt head is movable, and a closure within said bearing sleeve and having its outer end flush with the outer face of the boiler sheet.

In testimony whereof, we have signed this specification in the presence of a subscribing witness.

JOHN RUGERS FLANNERY. ETHAN I. DODDS. Witness:

EDWIN S. RYcE. 

